CN2694234Y - Automatic meter reading system without power supply - Google Patents
Automatic meter reading system without power supply Download PDFInfo
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- CN2694234Y CN2694234Y CN 200320108824 CN200320108824U CN2694234Y CN 2694234 Y CN2694234 Y CN 2694234Y CN 200320108824 CN200320108824 CN 200320108824 CN 200320108824 U CN200320108824 U CN 200320108824U CN 2694234 Y CN2694234 Y CN 2694234Y
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- meter reading
- automatic meter
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- 238000000034 method Methods 0.000 abstract description 15
- 238000001514 detection method Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 239000013307 optical fiber Substances 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000004807 localization Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013308 plastic optical fiber Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
The utility model discloses an automatic meter reading system without power supply which discloses a zero and one absolute type encode carried on the same circumference, namely the same line of a mechanical print wheel, and discloses the arranging method and the detection device of the sensor on the same circumference. The automatic meter reading system without power supply with two layer network structure and low power consumption is composed of the equipments of an absolute type encoding table, a gateway type concentrator, a collecting copy device, a four-line system 458 bus line (wherein, two lines are the power lines, and two lines are the 458 signal lines), etc. The system is power off at ordinary times, and is power on in reading the meter. The absolute type coding method on one line occupies smaller area, the processing is easy, and the installation of the sensor is convenient. The automatic meter reading system without the power supply with two layers structure has the advantages of less maintenance work, low power consumption, complete coincident mechanical reading with the electronic reading, high reliability, etc.
Description
Technical field
The utility model relates to a kind of passive Automatic meter reading system.
Background technology
Mechanical character wheel counter is widely used on ammeter, gas meter, water meter, mileometer and other accumulation formula measuring instrument, because it is simple in structure, and low price, reliable operation all is an irreplaceable metering method in a very long time.These stem-winder tools are made up of some character wheels, are generally mechanical reading.Yet,, often require these mechanical hook-ups so that remote transmission is given computer system, to be convenient to calculate and management with electronization, digitized form output metering result along with the development of technology.
Current, the method for some electronic digitalizings has been proposed, wherein a kind of is to carry out digitized processing by the pulsed counting, that is, adopt effects such as light, magnetic to produce the pulsed electric signal for a certain rotary machine.There are some shortcomings in this method:
(1) mechanical reading and electronic impulse metering result's (electronical reading), often disunity can produce some disputes like this;
(2) electronic impulse is interfered easily, and is disturbed and error that produce for good and all is recorded among the result;
(3) measuring system of electronic impulse often needs powered battery, and this needs little power consumption design, and this has also limited the application of some advanced measuring techniques.
Recent years, also the someone has proposed some and directly mechanical character wheel has been detected the method for identification, mainly contains light, magnetic, electricity detection modes such as (resistance).The characteristics of conventional detection are,
(1) the resistance-type detection method is a kind of contact detection method, is unfavorable for the long-term stability and the measuring accuracy of product;
(2) coding on the character wheel sagittal plane, n position coding just needs n road circumference, and area occupied is big, because character wheel is installed compactness, is not easy to the installation and measuring device;
(3) at i.e. coding on line on the circumference, few people discuss how to calculate the number of absolute type loop coding, sensor so far, and how to divide character wheel and sensor installation.
Summary of the invention
The purpose of this utility model provides a kind of passive Automatic meter reading system.
System is: palm PC, computer management information system are joined through infrared interface, telephone network and integrated reading device respectively, integrated reading device joins through 4 line systems, 485 buses and gateway formula concentrator 1, more than 2 gateway formula of gateway formula concentrator concentrator, gateway formula concentrator 1, more than 2 gateway formula of gateway formula concentrator concentrator connect with absolute encoding table 1, many absolute encoding epiphases of absolute encoding table 2 respectively, make up passive Automatic meter reading system one 2 layer network structure, low-power consumption by absolute encoding table, gateway formula concentrator, integrated reading device, 4 line systems, 485 buses.
Advantage of the present utility model:
1) absolute encoding method area occupied is few on line, and processing easily stamps reflective membrane or magnetic material gets final product such as the next door in the positive numeral of character wheel;
2) Bian Ma error control and calculating easily;
3) help designing the installation site and the detection method of sensor;
4) the absolute encoding table has mechanical reading and electronical reading simultaneously, and keeps in full accord; The electronical reading device does not influence the measuring accuracy of original primary instrument;
5) the automatic identifier word wheel location of absolute encoding table is not the metering of pulse accumulation formula, need not initialization, and the kilowatt meter reading-out system maintenance workload is few;
6) the passive meter reading system directly transmits number, and non-pulse signal even error occurs, also is not to be accumulated among the result, so also can stablize, realize accurately, reliably metering under the environment for use of complexity;
7) passive meter reading system routine work need not power supply, has avoided because power supply instability, unreliable or error in dipping that fault causes and a large amount of maintenance works;
8) since the passive meter reading systematic memory be the character wheel position, and non-pulse, even so water meter when the reversing situation takes place, the automatic data logging data keep in full accord with the reading of once showing tool;
9) adopt 2 layer network structures, can reduce the communication current of 485 buses, particularly under battery powered situation, also help localization of fault and isolation, be convenient to system maintenance.
Description of drawings
Fig. 1 is the synoptic diagram of sign special token and sensor installation thereof;
Fig. 2 is passive Automatic meter reading system structural representation;
Fig. 3 is the electrical schematic diagram of gateway formula concentrator in the passive Automatic meter reading system.
Embodiment
The gordian technique of mechanical character wheel electronic digitalizing method is the absolute encoding method on the same circumference of character wheel, comprises two aspects, the absolute encoding method of (1) mechanical character wheel; (2) setting angle of sensor and detection method.
The purpose that realizes the mechanical character wheel electronic digitalizing is to make up a passive Automatic meter reading system.The implication of " passive " is not to table tool and communication network power supply, just to power in the time of need checking meter at ordinary times.The implication of " automatically " is on the basis of communication network, can perhaps realize remote automatic meter reading by MODEM by palm PC (write by hand machine, PDA) automatic data logging.Because some table tools as water meter, gas meter, need powered battery sometimes.Therefore, the basic demand of passive Automatic meter reading system is low-power consumption.
In order correctly to discern 10 numerals such as 0,1,2,3,4,5,6,7,8,9, in the time of will noticing that especially the low level character wheel is from 9 to 0 rotation processes, mechanical reading also is in critical localisation.So we need to discern 20 positions at least, comprise the position of 10 numerals such as 0 to 9 grade and the critical localisation between 10 numerals thereof.The position of identification is many more, and precision is high more, and the sensor that needs is also just many more, and cost is just high more.So as long as we are 20 positions of identification.This is the problem that previous patent does not have consideration.
As Fig. 1, these 20 positions are called 0,09,9,98,8,87,7,76,6,65,5,54,4,43,3,32,2,21,1,10 respectively, and wherein 0 represents digital 0 position, the critical localisation between the 09 expression numeral 9 and 0.These 20 positions are evenly cut apart, and each position accounts for 18 degree.
Represent with 1,0 whether certain position coats special token, coding 0,1,0,1,1,1,0,0,1,1,1,1,1,0,1,0,0,0,0,1 expression, the position of coating special token has 10,21,2,32,4,54,5,65,6,7,09.This coding is divided into 5 sections to circumference, and the arc of promptly coating special token has: (1) 10; (2) 21,2,32; (3) 4,54,5,65,6; (4) 7; (5) 09.
Other coding has,
(1)0，1，0，1，0，0，0，0，0，1，1，0，0，0，1，0，1，1，1，1；
(2)0，1，1，1，1，0，1，0，1，0，0，0，1，1，0，0，0，0，0，1；
(3)0，1，1，0，1，0，1，0，0，0，0，0，1，1，1，0，0，0，1，0；
(4)0，0，0，0，0，1，0，1，0，0，1，0，0，0，1，1，0，1，1，1；
(5)0，1，0，1，1，1，0，1，0，0，1，0，0，0，1，1，0，0，0，0；
(6)1，0，0，1，0，1，0，1，1，0，0，0，0，0，1，0，0，1，1，1；
(7)1，0，1，0，0，0，1，0，1，0，1，1，1，1，0，0，0，0，0，1；
(8)0，0，0，0，1，0，1，1，0，1，0，0，1，1，1，1，0，0，1，0；
(9)1，0，0，1，0，1，0，1，1，0，0，0，0，0，1，1，0，1，1，1；
(10)0，1，1，1，1，0，1，0，0，0，1，0，1，0，1，1，0，0，0，0；
(11)0，1，1，0，1，0，1，0，0，1，1，1，1，0，1，1，0，0，0，0；
(12)1，1，1，1，0，1，0，0，1，0，1，1，0，0，0，0，0，1，1，0；
(13)0，0，0，0，0，1，0，1，1，1，1，1，0，1，0，1，0，0，1，1；
(14)1，0，0，1，0，1，0，1，1，0，0，0，0，1，0，0，1，1，1，1；
(15)1，0，0，1，0，1，0，1，1，0，0，0，0，1，1，0，1，1，1，1；
(16)1，0，0，0，0，0，1，0，1，0，1，1，1，1，1，0，0，1，1，0；
(17)1，0，1，0，0，0，1，0，1，0，1，1，1，1，1，0，0，0，0，1；
(18)1，0，1，0，0，0，0，1，0，1，0，1，1，1，0，0，1，1，1，1；
(19)1，1，0，1，0，0，0，1，0，1，1，0，1，1，1，0，0，1，1，1；
(20)1，0，0，1，1，0，1，1，1，1，1，0，1，0，1，0，0，0，0，0；
(21)1，1，1，1，1，0，1，0，0，0，1，0，1，0，1，1，0，0，0，0；
(22)0，0，0，0，0，1，1，1，0，1，0，1，1，1，1，1，0，0，0，1；
(23)0，1，0，0，0，0，0，1，1，1，0，1，1，1，1，1，0，0，0，1；
(24)0，1，1，1，1，1，0，0，1，0，0，0，1，1，0，0，0，0，0，1；
(25) 0,1,1,1,1,1,0,0,0,1,1,0,0,1,0,0,0,0,0,1; Or the like.
The characteristics of these codings are that the arc of coating special marking is 4 sections or 5 sections that are separated by; Continuous 0 or 1 number is no more than 5.These codings through negates, left and right sidesing shifting, about operation such as exchange, its result also is suitable for.
Sensor is for the position sensing of coating special token, and the signal of sensor output is made as high level; Insensitive for the position of not coating special token, the signal of sensor output is made as low level.The output of all the sensors has determined the angle of this character wheel under character wheel, has also determined the numeral that view directions is seen.
Consider following 3 technical conditions, (1) equals 1 for the Hamming distance that guarantees the adjacent encoder that sensor is exported continuously.The interval of sensor is less than 18 degree, and the angle between any two sensors is not 18 integral multiple, such as 15.7 degree.The sensor span of (2) character wheels is greater than 5 positions, and promptly 90 degree guarantee existing high level in the signal of sensor like this, and low level is arranged again.(3) can discern 20 positions.The technical matters that these previous patents are not considered.
The sensor number that satisfies these 3 technical conditions is at least 7, and the example that can realize is uniformly-spaced to install according to 15.7 degree.Condition (1) helps discerning 20 positions of character wheel; Condition (2) helps getting threshold value, reduces signal and disturbs; Condition (3) helps distinguishing numeral and critical localisation thereof.Like this, a position may corresponding a plurality of codings.
This shows that the angular distribution of special token and sensor has determined an absolute encoding.
Character wheel can be discerned by single-chip microcomputer after realizing absolute encoding easily.The purpose of invention absolute encoding is as Fig. 2, to make up passive Automatic meter reading system one 2 layer network structure, low-power consumption by table tool (electronization), gateway formula concentrator, integrated reading device, 4 line systems, 485 buses (2 order wires, 2 power leads).
The key equipment of 2 layer network structures is gateway formula concentrators.As Fig. 3, the principle of work of gateway formula concentrator is, gateway formula concentrator is communicated by letter with integrated reading device by 485 bus driver U1, communicates by letter with subordinate's table tool with relay K 2 by 485 bus driver U6, and relay K 2 is being controlled power supply, the signal circuit of 485 buses of leading to the absolute encoding table.When gateway formula concentrator receives packet when belonging to its subordinate's table tool, the relay that closes, and select SELA=1 to make the RXD of single-chip microcomputer, TXD signal be communicated with RXDO, TXDO.Wherein U3 is a code translator, and SELA=0 makes the RXD of single-chip microcomputer, TXD signal be communicated with RXD1, TXD1 at ordinary times; The logical expression of code translator U3 is:
RXD＝SELA*RXDO+！SELA*RXD1；
TXDO＝SELA*TXD；
TXD1＝！SELA*TXD。
Embodiment 1:
Coding is 0,0,0,0,0,1,1,1,0,1,0,1,1,1,1,1,0,0,0,1.32,3,43,54,65,6,76,7,87,09 place coats magnetic material in the position, 8 hall devices of installation below each character wheel, and 8 hall device intervals 15.7 are spent, and are used to detect the position of character wheel.This method is applicable to dry type, wet type table.
Embodiment 2:
Coding is 0,1,0,1,1,1,0,0,1,1,1,1,1,0,1,0,0,0,0,1.10,21,2,32,4,54,5,65,6,7,09 place coats silvery white in the position, and black is coated in other position.
Character wheel coding circle designs is on the next door of the numeral in character wheel front.Adopt cheap plastic optical fiber as optical material, each sensor is made up of a pair of optical fiber, a power valve and a receiving tube.This is to the position that is coated with (white, black) color of an as far as possible close character wheel of optical fiber; An optical fiber in the other end is facing to power valve, and another is facing to receiving tube.When one of optical fiber white portion facing to character wheel, the light that power valve sends is through optical fiber, is mapped on the character wheel back reflection and returns, and arrive receiving tube, and single-chip microcomputer is judged as high level 1.When one of optical fiber black region facing to character wheel, the light that power valve sends is through optical fiber, do not reflect after being mapped on the character wheel, and receiving tube does not receive light signal, and single-chip microcomputer is judged as low level 0.Interval 15.7 degree of optical fiber under the character wheel.
This method mainly is applicable to the dry type table.
Claims (1)
1. passive Automatic meter reading system, it is characterized in that: palm PC, computer management information system is respectively through infrared interface, telephone network and integrated reading device join, integrated reading device is through (4) line system 485 buses and gateway formula concentrator (1), the a plurality of gateway formula of gateway formula concentrator (2) concentrator joins, gateway formula concentrator (1), the a plurality of gateway formula of gateway formula concentrator (2) concentrator respectively with absolute encoding table (1), the a plurality of absolute encoding epiphases of absolute encoding table (2) connect, by the absolute encoding table, gateway formula concentrator, integrated reading device, 4 line systems, 485 buses make up one 2 layer network structure, the passive Automatic meter reading system of low-power consumption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320108824 CN2694234Y (en) | 2003-10-08 | 2003-10-08 | Automatic meter reading system without power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320108824 CN2694234Y (en) | 2003-10-08 | 2003-10-08 | Automatic meter reading system without power supply |
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| CN2694234Y true CN2694234Y (en) | 2005-04-20 |
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| CN 200320108824 Expired - Lifetime CN2694234Y (en) | 2003-10-08 | 2003-10-08 | Automatic meter reading system without power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100347524C (en) * | 2005-04-30 | 2007-11-07 | 浙江大学 | Wireless and passive water meter and gas meter |
| CN105046913A (en) * | 2015-07-09 | 2015-11-11 | 广西牛博物联信息技术有限公司 | Remote environmental monitoring data acquisition system |
-
2003
- 2003-10-08 CN CN 200320108824 patent/CN2694234Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100347524C (en) * | 2005-04-30 | 2007-11-07 | 浙江大学 | Wireless and passive water meter and gas meter |
| CN105046913A (en) * | 2015-07-09 | 2015-11-11 | 广西牛博物联信息技术有限公司 | Remote environmental monitoring data acquisition system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20060111 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |